DETECTING MEDIA WATERMARKS IN MAGNETIC FIELD DATA
First Claim
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1. A method to detect media watermarks, the method comprising:
- accessing multidimensional magnetic field data representative of values of a magnetic field measured within a first distance of audio circuitry that is to output an audio signal corresponding to media presented by a media device; and
processing the multidimensional magnetic field data to detect a watermark included in the audio signal.
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Abstract
Methods, apparatus, systems and articles of manufacture (e.g., physical storage media) to detect media watermarks in magnetic field data are disclosed herein. Example methods disclosed herein to detect media watermarks can include accessing multidimensional magnetic field data representative of values of a magnetic field measured within a first distance of audio circuitry that is to output an audio signal corresponding to media presented by a media device. Such example methods can also include processing the multidimensional magnetic field data to detect a watermark included in the audio signal.
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Citations
20 Claims
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1. A method to detect media watermarks, the method comprising:
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accessing multidimensional magnetic field data representative of values of a magnetic field measured within a first distance of audio circuitry that is to output an audio signal corresponding to media presented by a media device; and processing the multidimensional magnetic field data to detect a watermark included in the audio signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A tangible machine readable storage medium comprising machine readable instructions which, when executed, cause a machine to at least:
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access multidimensional magnetic field data representative of values of a magnetic field measured within a first distance of audio circuitry that is to output an audio signal corresponding to media presented by a media device; and process the multidimensional magnetic field data to detect a watermark included in the audio signal. - View Dependent Claims (10, 11, 12, 13)
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14. An apparatus to detect media watermarks, the apparatus comprising:
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a magnetic field estimator to access multidimensional magnetic field data representative of values of a magnetic field measured within a first distance of audio circuitry that is to output an audio signal corresponding to media presented by a media device; and a watermark detector to process the multidimensional magnetic field data to detect a watermark included in the audio signal. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification